Run knife around edges of pan to loosen loaf. Remove loaf from pan; place on wire rack. Cool completely, about 1 hour 30 minutes.

4

In small microwavable bowl, microwave vanilla baking chips on High 30 seconds. Stir until melted; if necessary, microwave in additional 10-second increments until melted. Beat in powdered sugar and enough milk until smooth and desired drizzling consistency. Drizzle icing over loaf. Let stand until icing is set before storing.